Elance Exams Answers PDF file

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What's the difference between the "var" keyword and the new "let" keyword which appears in ECMAScript 6 ?

The "let" allows programmers to do variables assignment by "destructuring"
The "let" is the new "var". It's faster to create and initialize variables in the computer
The "let" was introduced only to deal with for() loops because it's faster than a "var" in that case
The "let" declares a local value to a block scope whereas the "var" defines a variable more globally
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